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    <script>
        var sum = 0;
        var average = 0;
        for (var i = 1; i <= 100; i++) {
            sum = sum + i;
        }
        average = sum / 100;
        console.log('1~100之间所有数的总和是:' + sum);
        console.log('1~100之间所有数的总数之和的平均值是:' + average);
    </script>
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